1. Kelly Oubre Jr.
Without question the best player on this list, and there's plenty of fans who would love to see Kelly Oubre Jr. back with the team as well. Signed to a one-year, $2.8 million deal by the Phildelphia 76ers, Oubre Jr. started 52-of-68 games played for the team this season. It would have been more, if not for an off the court incident earlier in the campaign.
Oubre Jr. fits checks every box for the Suns, and he is the one former player they should be targeting hard. He's still somehow only 28-years-old, and can be trusted to both start and come off the bench. In the 76ers' opening game of the playoffs against the New York Knicks, he started and played 39 minutes.
Perhaps most importantly of all, he can score at a level that the Suns badly need for their fourth, fifth or sixth option at any given time. Consider that Grayson Allen had a career year by putting up 13.5 points per game, the most of his career to date. He did this by leading the league in 3-point shooting, and was rewarded with a four-year, $70 million deal.
Only he went cold in the Suns' Game 1 postseason loss to the Minnesota Timberwolves, going 0-for-3 and not stepping into those shots with any degree of confidence. Oubre Jr., despite not being a good 3-point shooter at all, averaged 15.4 points during the regular season, and is on a minimum deal. The Suns know how good he can be on any given night, and he'd be a huge addition.